{"schema_version":"secwatch.filing_event.v1","accession":"0002019804-26-000021","form_type":"8-K","ticker":"IMSR","cik":"0002019804","company_name":"Terrestrial Energy Inc. /DE/","filed_at":"2026-07-31T20:06:01+00:00","discovered_at":"2026-07-31T20:07:00.623843+00:00","generated_at":"2026-07-31T20:07:23.651981+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Director Shawn Matthews resigns from Terrestrial Energy board effective July 27, 2026","bullets":["Shawn Matthews resigned from the Board of Directors on July 27, 2026.","Resignation not due to any disagreement with company operations, policies, or practices.","No replacement director has been announced as of the filing date."],"urls":{"canonical":"https://secwatch.observer/filing/0002019804-26-000021","json":"https://secwatch.observer/filing/0002019804-26-000021.json","markdown":"https://secwatch.observer/filing/0002019804-26-000021.md","text":"https://secwatch.observer/filing/0002019804-26-000021.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/2019804/000201980426000021/0002019804-26-000021-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/2019804/000201980426000021/tmb-20260727x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-07-31T20:07:23.651981+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}